Commit 22dab218 authored by Qiu Chaofan's avatar Qiu Chaofan Committed by Hans Wennborg
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Revert "[SelectionDAG] Remove unused FP constant in getNegatedExpression" 

2508ef01 doesn't totally fix the issue since we did not handle the case
when unused temporary negated result is the same with the result, which
is found by address sanitizer.

(cherry picked from commit e1669843)
parent 791b7e9f
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